What’s not to like? Costs of barrel replacements, if the loads push bullets as fast as the civilian ones. ;-)
Over All Length OAL of the .243 is between 2.6 and 2.7 is gonna put the rifle in a 7.62 x 51 mag well size lower which holds the nato round OAL around 2.75..... So think SR-25 or AR-10 size rifle.....Mk 11 Hk series. More than a just a barrel swap sadly. The 243 with a 105gr ball round runs around 2900 fps...... love the load. Plus....as we’re not in a fight with a uniformed enemy go to a boat tail hollow point to use on ISIS style enemies.
Stay Safe !